• Journal of the Korean Institute of Telematics and Electronics B
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• v.31B no.8
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• pp.1-10
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• 1994

In this paper load redistribution algorithm to allow fault-tolerance by redistributing the workload of n failure nodes to the remaining good nodes in distributed systems are investigated. To evaluate the efficiency of the algorithms a simulation model of algorithms is developed using SLAM II simulation language. The job arrival rate service rate failure and repair rate of nodes and communication delay time due to load migraion are used as parameters. The result of the simulation shows that the job arrival rate failure and repair rate of nodes do not affected on the relative efficiency of algorithms. If the communication delay time is greater than average job processing time algorithm B is better. Otherwise algorithm C is superior to the others.

• Journal of the Korea Society for Simulation
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• v.3 no.1
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• pp.89-98
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• 1994

In this paper, a criteria for selecting an appropriate load redistribution algorithm is devised so that a fault-tolerance distributed system can operte at its optimal efficience. To present the guideline for selecting redistributing algorithms, simulation models of fault-tolerant system including redistribution algorithms are developed using SLAM II. The job arrival rate, service rate, failure and repair rate of nodes, and communication delay time due to load migration are used as parameters of simulation. The result of simulation shows that the job arrival rate and the failure rate of nodes are not deciding factors in affecting the relative efficiency of algorithms. Algorithm B shows relatively a consistent performance under various environments, although its performance is between those of other algorithms. If the communication delay time is longer than average job processing time, the performance of algorithm B is better than others. If the repair rate is relatively small or communication delay time is longer than service time, algorithm A leads to good performance. But in opposite environments, algorithm C is superior to other algorithms.

• Safety and Health at Work
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• v.2 no.2
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• pp.194-200
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• 2011

Objectives: Stressors in nursing put high demands on cognitive control and, therefore, may increase the risk of cognitive failures that put patients at risk. Task-related stressors were expected to be positively associated with cognitive failure at work and job control was expected to be negatively associated with cognitive failure at work. Methods: Ninety-six registered nurses from 11 Swiss hospitals were investigated (89 women, 7 men, mean age = 36 years, standard deviation = 12 years, 80% supervisors, response rate 48%). A new German version of the Workplace Cognitive Failure Scale (WCFS) was employed to assess failure in memory function, failure in attention regulation, and failure in action exertion. In linear regression analyses, WCFS was related to work characteristics, neuroticism, and conscientiousness. Results: The German WCFS was valid and reliable. The factorial structure of the original WCF could be replicated. Multilevel regression task-related stressors and conscientiousness were significantly related to attention control and action exertion. Conclusion: The study sheds light on the association between job characteristics and work-related cognitive failure. These associations were unique, i.e. associations were shown even when individual differences in conscientiousness and neuroticism were controlled for. A job redesign in nursing should address task stressors.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.151-152
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• 2009

Grid 컴퓨팅 환경에서 Risk-resilient 한 Job 수행을 보장하기 위해 그 동안 Job migration 기법이 연구되어 왔으나, 자원 재선정 및 Job 이동/재할당에 따른 기준의 단순성으로 인해, Migration에 따른 Job 수행의 이득과 손실이 정확하게 판별되지 못한 경향이 있었다. 따라서 본고에서는 Job failure Rate을 바탕으로 특정 Job의 확률적 수행 지연 시간을 추정하고, 이를 이용하여 Migration gain을 평가하는 모델을 제안한다.

• Journal of the Korea Society of Computer and Information
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• v.15 no.2
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• pp.1-8
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• 2010

In this paper, we propose a scheduling strategy for grid environment that reduces resource cost. This strategy considers resource cost and job failure rate to efficiently allocate local computing resources. The key idea of our strategy is that we use two-level scheduling using remote and local scheduler. The remote scheduler determines the expected total execution times of jobs using the current network and local system status maintained in its resource database and allocates jobs with minimum total execution time to local systems. The local scheduler recalculates the waiting time and execution time of allocated job and uses it to determine whether the job can be processed within the specified deadline. If it cannot finish in time, the job is migrated other local systems, through simulation, we show that it is more effective to reduce the resource cost than the previous Greedy strategy. We also show that the proposed strategy improves the performance compared to previous Greedy strategy.

• International Journal of Quality Innovation
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• v.8 no.1
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• pp.137-153
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• 2007

Failure mode and effects analysis (FMEA) is a preventive technique in reliability management field. The successful implementation of FMEA technique can avoid or reduce the probability of system failure and achieve good product quality. The FMEA technique had applied in vest scopes which include aerospace, automatic, electronic, mechanic and service industry. The marking process is one of the back ends testing process that is the final process in semiconductor process. The marking process failure can cause bad final product quality and return although is not a primary process. So, how to improve the quality of marking process is one of important production job for semiconductor testing factory. This research firstly implements FMEA technique in laser marking process improvement on semiconductor testing factory and finds out which subsystem has priority failure risk. Secondly, a CCD position solution for priority failure risk subsystem is provided and evaluated. According analysis result, FMEA and CCD position implementation solution for laser marking process improvement can increase yield rate and reduce production cost. Implementation method of this research can provide semiconductor testing factory for reference in laser marking process improvement.

• Journal of Digital Contents Society
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• v.16 no.5
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• pp.691-697
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• 2015

Supercomputers are used for many different areas including new product design of industries as well as state-of-the-art science and technology for large amount of computational needs. Tachyon is a 4th supercomputer built at KISTI that is a high-performance parallel computing system with 3,200 computing nodes and infrastructures. This system is currently about 10,000 users and over 170 organizations are used, the number of jobs they are performing work in batch type form through a scheduler. Also, this system logs lots of job scripts, execution environment, library, job status from the job submit to end. In this paper, we analyzed batch jobs information from Sun Grid Engine, that use as a scheduler in Tachyon system, and job executed information in Tachyon System. In particular, we distinguished the fail jobs from the all tasks that users perform and we analyzed the cause of failure. Among them, we can extracted some of jobs that can be regarded as normal jobs through the improvement in those works logged as all of fail jobs.

• The Journal of the Korea Contents Association
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• v.15 no.12
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• pp.541-549
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• 2015

Research about U.S. and European countries demonstrated that startups and young firms account for nearly all net job creation. If we want to bring down unemployment and to increase economic growth rate, we need to create new companies and to make them to grow. Credit availability is one of the most important factors for entrepreneurs as they attempt to start or expand a business. For young firms, access to credit for business growth can mean the difference between survival and failure. Equity crowdfunding is an innovative means of raising capital for businesses. Crowdfunding campaigns can give new business access to a large pool of investors. This brings huge benefits for marketing and increase provability of success of business and ROI, so it leads follow-on investment from Venture Capital and Angel investors. In Korea, the survival rate of startups and average growth rate of survivors is far lower than those of the U.S or other countries due to lack of funds for startup or early business growth. Equity crowdfunding can be a new funding source for venture or startups. It can increase startup and survival rate, in addition to the growth rate of survivors, resulting in decreased unemployment rate. In Korea, Equity crowdfunding will be available from 2016. Further study is needed to determine whether the impact of crowdfunding in Korea on job creation will be similar to its impact in the U.S.

• Journal of agricultural medicine and community health
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• v.32 no.3
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• pp.125-138
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• 2007

Objectives: This retrospective study is to identify related factors of treatment success of patients with tuberculosis at community health centers. Methods: The subjects of this study were 1,417 patients with tuberculosis treated in 28 community health centers. The predictors of tuberculosis treatment success were analyzed in terms of 2 areas, which were characteristics of patients and health centers(TB control program). The characteristics of patients consist of 2 factors, such as demographic & diagnosis and treatment. The present conditions of health centers consist of 3 factors, location of centers, resources, and community activities. Data were analysed using X2- test and logistic regression methods. Results: The significant differences between success group and failure group were sex(p=0.003), age(p=0.013), job(p=0.000), type of patients(p=0.001), past history(p=0.029), BCG injection(p=0.009), sputum culture examination(p=0.017), period of treatment(p=0.000), location of center(p=0.001), population per staff(p=0.015), FTE(p=0.027), education days of staff(p=0.005), BCG injection rate(p=0.001), case detection rate (p=0.003), and health education provision rate(p=0.044). Then these variables were analysed using logistic regression analysis. Significant positive factors of treatment success were occupation(95% CI:1.3-6.1), periods of treatment(95% CI:1.5-2.2), center in large city(95% CI:1.2-16.7), center in middle city(95% CI:2.1-24.3), job education related TB(95% CI:1.02-1.3), and BCG injection rate(95% CI:1.1-303.4). Significant negative factors of treatment success were male(95% CI:0.1-0.5) and treatment after default(95% CI:0.005-0.5). Conclusions: Tuberculosis is still one of serious diseases in Korea, because it causes highest mortality rate among OECD countries. This study may provide information to improve treatment effectiveness of tuberculosis at community health centers.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.5
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• pp.727-739
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• 2021

Over the past decades, the Jordanian government has made great efforts to help poor women start small businesses by providing microcredit and facilitating financial services. Although in Jordan almost hundreds of thousands of women have the ability to contribute more fully to their economy, they are reluctant to do so. Women's participation in economic activities in 2016 was only 13.2%, while the unemployment rate for Jordanian women was 24.1%. The decline in women's participation in small business management has gradually become an important issue following the trial of more than 13,000 Jordanian women for non-payment of their micro-loans. This study aims to identify the factors that hinder Jordanian women from achieving job stability. In this qualitative study, a semi-structured interview method with sixteen open-ended questions was used to collect relevant data. A purposeful sampling method is also used to select participants. To analyze the data, this study used NVivo 11 software as a method. Using System Theory, this study showed that women's failure depends on three factors: women entrepreneurs, the environment around women entrepreneurs, and micro-financial institutions. Findings of this study suggest that strengthen women's entrepreneurship sustainability and minimize the risk of failure should be done through integrated strategies include these three domains.